RRB NTPC 2021 PYQs

Question 1

Select the Venn diagram that best represents the relationship between the given set of classes.Students, Interns and Research scholars

Accepted Answer

Some students can be interns, and some interns can be research scholars. Also, some students can be research scholars. This implies overlapping circles, where all three categories share common members.

Question 2

Which of the following incidents took place after the victory of the British in the Battle of Plassey, in 1757?

Accepted Answer

The Battle of Plassey established British dominance, leading to the expansion of the British East India Company's trade and political influence in India.

Question 3

When did Moplah revolt (Malabar Rebellion) in Kerala take place?

Accepted Answer

The Moplah Rebellion, also known as the Malabar Rebellion, was a significant uprising that occurred in Kerala in the year 1921.

Question 4

If x is the closest approximation to the product 0.3333 × 0.25 × 0.499 × 0.125 × 24, then find the value of x.

Accepted Answer

Approximate the decimals to fractions: 0.3333 ≈ 1/3, 0.25 = 1/4, 0.499 ≈ 1/2, 0.125 = 1/8. Multiply (1/3) × (1/4) × (1/2) × (1/8) × 24 = 24 / (3 × 4 × 2 × 8) = 24 / 192 = 1/8. The closest integer is 18.

Question 5

If‌13A =‌14B =‌15C, then A : B : C = ?

Accepted Answer

Let 1/3A = 1/4B = 1/5C = k. Then A = 3k, B = 4k, C = 5k. So, A : B : C = 3k : 4k : 5k = 3 : 4 : 5.

Question 6

Which committee was set up by Lord Chelmsford to enquire into Jallianwala Bagh incident in 1919?

Accepted Answer

The Hunter Committee was established by Lord Chelmsford in 1919 to investigate the Jallianwala Bagh massacre. This is a direct factual recall question.

Question 7

What was the name of the first Indian satellite launched into the orbit?

Accepted Answer

The first Indian satellite launched into orbit was Aryabhata. It was launched on April 19, 1975, by the Soviet Union.

Question 8

URL stands for:

Accepted Answer

URL stands for Uniform Resource Locator. It is the address of a given unique resource on the World Wide Web.

Question 9

Which of the following bodies recommends minimum support price for crops?

Accepted Answer

The Commission for Agricultural Costs and Prices (CACP) is responsible for recommending Minimum Support Prices (MSPs) for various crops to the government.

Question 10

Dena bank and Vijaya Bank have recently merged with:

Accepted Answer

Dena Bank and Vijaya Bank were merged with Bank of Baroda on April 1, 2019, creating India's third-largest public sector bank.

Question 11

Identify the number that is different from the rest.23, 29, 31, 37, 42, 43, 47

Accepted Answer

All numbers except 42 are prime numbers. 42 is a composite number, divisible by 2, 3, 6, 7, 14, 21.

Question 12

In ΔABC, ∠BAC = 60°, and O is a point inside ΔABC. If ∠OBC is two times ∠OBA and ∠OCB is two times ∠OCA, then what will be the measure of ∠BOC?

Accepted Answer

Let ∠OBA = x and ∠OCA = y. Then ∠OBC = 2x and ∠OCB = 2y. In ΔABC, ∠A + ∠B + ∠C = 180°. So 60° + 3x + 3y = 180°, which means x + y = 40°. In ΔBOC, ∠BOC = 180° - (2x + 2y) = 180° - 2(x + y) = 180° - 2(40°) = 100°.

Question 13

Goods that are brought not for meeting the immediate need of the consumer but for producing other goods are called _______.

Accepted Answer

Capital goods are used to produce other goods, not for direct consumption. This definition directly matches the question's description.

Question 14

Which one of the following is not an international organization?

Accepted Answer

The Defence Research and Development Organization (DRDO) is an agency of the Government of India, making it a national, not international, organization.

Question 15

According to the time by Rick's watch its quarter past eight. If the minute hand points towards the east, towards which direction would the hour hand point?

Accepted Answer

At 8:15, the minute hand is at 3 (East). The hour hand is slightly past 8. If 3 is East, then 6 is South, 9 is West, and 12 is North. 8 is between 6 and 9, so the hour hand points South-West.

Question 16

The value of 16x4+ 25y2– 40x2y at x = 5 and y = 2 is:

Accepted Answer

Substitute x=5 and y=2 into the expression. It simplifies to (4x^2 - 5y)^2. Calculate (4*25 - 5*2)^2 = (100 - 10)^2 = 90^2 = 8100.

Question 17

The angle of elevation of a pole from a point, which is 20 m away from the foot of the pole is 45°. Find the height of the pole.

Accepted Answer

Given angle of elevation is 45° and distance from foot is 20m. Using tan(45°) = height/base, and tan(45°) = 1, so height = base = 20m.

Question 18

The table gives the pass percentage of class X students of five government schools in Delhi on the basis of gender.SchoolPass PercentageRatio of boys and girlsA355 ∶ 6B323 ∶ 5C241 ∶ 2D193 ∶ 2E155 ∶ 3What is the ratio of the pass percentage of boys of school B to the pass percentage of boys of school C?

Accepted Answer

For School B, boys' pass percentage is 32 * (3/(3+5)) = 12%. For School C, boys' pass percentage is 24 * (1/(1+2)) = 8%. The ratio is 12:8, which simplifies to 3:2.

Question 19

Which of the following is NOT an input device?

Accepted Answer

A plotter is an output device used for printing vector graphics, unlike light pens, trackballs, and touch screens which are all input devices.

Question 20

371+ 372+ 373+ 374+ 375is divisible by:

Accepted Answer

The sum is 371+372+373+374+375 = 1865. To check divisibility by 11, alternate sum of digits: 5-6+8-1 = 6. Since 6 is not divisible by 11, the sum 1865 is not divisible by 11. Let's recheck the sum. The sum is 1865. None of the options are correct. Let's re-evaluate the question. The question is 3^71 + 3^72 + 3^73 + 3^74 + 3^75. Take 3^71 common: 3^71 (1 + 3^1 + 3^2 + 3^3 + 3^4) = 3^71 (1 + 3 + 9 + 27 + 81) = 3^71 (121). Since 121 is divisible by 11, the entire expression is divisible by 11.